Carbohydrate antigens expressed by malignant tissue. They are useful as tumor markers and are measured in the serum by means of a radioimmunoassay employing monoclonal antibodies.

Synonyms: Antigen, Carcinoma Associated, Tumor Associated Carbohydrate Antigens, Antigens, Cancer-Associated Carbohydrate, CA(Oxford) Antigen, Tumor-Associated Carbohydrate Antigens, Antigens, Carbohydrate, Tumor-Associated, Carbohydrate Antigens, Tumor Associated, Cancer Associated Carbohydrate Antigens, Carbohydrate Antigens, Cancer-Associated, Cancer-Associated Carbohydrate Antigens, CA Antigen, 0, Epitectin, Antigens, CA, CA Antigens, Carcinoma-Associated Antigen, Antigens, Tumor-Associated, Carbohydrate, Antigens, Tumor-Associated Carbohydrate, Antigen, CA, Carcinoma Associated Antigen, Carbohydrate Antigens, Tumor-Associated, Antigen, Carcinoma-Associated